1.The sent their parents somegifts.
-> Some gifts were sent their parents
-> Their parents were sent some gifts 
2.His wife helped him with some work.
-> He was helped with some work by his wife
3.The teacher gave her students a lot of homework.
-> The students were given a lot of homework by the teacher
-> The teacher's students were given a lot of homework.
4.Mrs Lan borrowed me some books.
-> I was borrowed some books by Mrs Lan
5.My mom told me lots of stories
-> I was told lots of stories by my mom

CHẤM ĐIỂM CHO MÌNH NHÉ! THANKS